EP2853722A1 - System for preventing a mechanical damage of an internal combustion engine due to an inefficient lubrication of the engine - Google Patents

System for preventing a mechanical damage of an internal combustion engine due to an inefficient lubrication of the engine Download PDF

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Publication number
EP2853722A1
EP2853722A1 EP14186815.8A EP14186815A EP2853722A1 EP 2853722 A1 EP2853722 A1 EP 2853722A1 EP 14186815 A EP14186815 A EP 14186815A EP 2853722 A1 EP2853722 A1 EP 2853722A1
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EP
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Prior art keywords
internal combustion
combustion engine
engine
limiting
controlling
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Application number
EP14186815.8A
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German (de)
French (fr)
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EP2853722B1 (en
Inventor
Bruno Aimar
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FPT Industrial SpA
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FPT Industrial SpA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/18—Lubricating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • F01M1/20—Indicating or safety devices concerning lubricant pressure
    • F01M1/22—Indicating or safety devices concerning lubricant pressure rendering machines or engines inoperative or idling on pressure failure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/107—Safety-related aspects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/228—Warning displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/024—Fluid pressure of lubricating oil or working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • F02D2250/26—Control of the engine output torque by applying a torque limit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention refers to the field of the system for protecting the mechanical elements of an internal combustion engine, possibly supercharged.
  • the present invention refers to the field of the systems for preventing the damage of a turbo-supercharging unit.
  • the lubricating circuit of an internal combustion engine tends to empty, when the engine is stopped, due to the gravitational effect.
  • the viscosity of the lubricating oil is highly influenced by the environmental conditions.
  • the viscosity of the oil increases and consequently it takes more time for the oil to reach the different mechanical parts of the internal combustion engine, such as the housing of the turbine and/or the compressor and thus the bearings thereof.
  • the aim of the present invention is to overcome all the aforementioned drawbacks and to provide a system for preventing a mechanical damage of an internal combustion engine, due to an inefficient lubrication of the latter.
  • the basic idea of the present invention is to provide a system that is able to estimate the inefficiency conditions of the lubricating circuit and to limit the degradation of the mechanical parts.
  • An object of the present invention is a system for preventing a mechanical damage of an internal combustion engine, due to an inefficient lubrication of the latter, in accordance with claim 1.
  • a possible over-use of the mechanical part of the engine, turbo-supercharger included, is estimated, limiting or inhibiting such over-use.
  • the engine, as well as the supercharging unit, are forced to reduce their number of revolutions.
  • Another object of the present invention is an internal combustion engine equipped with the aforementioned control system.
  • a further object of the present invention is a vehicle comprising an internal combustion engine equipped with the aforementioned control system.
  • Figure 1 shows a scheme of an internal combustion engine E equipped with at least one turbo-supercharging stage comprising a turbine T having an inlet connected with the exhaust manifold of the internal combustion engine and a compressor C, driven by the turbine T, having an outlet connected with the intake manifold of the internal combustion engine E.
  • the engine is equipped per se with processing means, for example an engine control unit ECU, means for measuring a pressure of the lubricating oil P and supply means J, generally the fuel injection system, controlled by the engine control unit ECU and/or by means for controlling the supercharging of the internal combustion engine, namely at least one among:
  • the prevention system is activated when the engine is started and stays active until a full filling and pressurization of the lubricating circuit is detected. In these case there are two options:
  • Futhermore compared with solutions of the mechanical type, it is possible to avoid any mechanical modification that is usually more expensive than the present invention, which can be advantageously implemented via software, by means of the aforementioned engine control unit ECU, or by means of any further electronic control unit onboard of the vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

System for preventing a mechanical damage of an internal combustion engine, due to an inefficient lubrication of the engine itself, comprising means for measuring or estimating a pressure of a lubrication circuit (P) of the internal combustion engine, processing means (ECU) configured to activate means for preventing a mechanical damage of the internal combustion engine (E) at each starting of the latter, until said pressure is below a predetermined threshold.

Description

    Application field of the invention
  • The present invention refers to the field of the system for protecting the mechanical elements of an internal combustion engine, possibly supercharged. In particular the present invention refers to the field of the systems for preventing the damage of a turbo-supercharging unit.
    • Description of the prior art
  • The lubricating circuit of an internal combustion engine tends to empty, when the engine is stopped, due to the gravitational effect.
  • After starting the engine, a certain time is thus necessary to fill and pressurize the respective lubricating circuit.
  • Furthermore, the viscosity of the lubricating oil is highly influenced by the environmental conditions. Thus, when the engine is cold, at low temperature, the viscosity of the oil increases and consequently it takes more time for the oil to reach the different mechanical parts of the internal combustion engine, such as the housing of the turbine and/or the compressor and thus the bearings thereof.
  • In this interval of time, such mechanical parts run without oil, with a serious deterioration of the parts themselves. Thus, such mechanical parts, above all belonging to the turbo-supercharger unit may have reliability problems if over-used before the lubricating circuit is efficient.
    • Summary of the invention
  • Therefore the aim of the present invention is to overcome all the aforementioned drawbacks and to provide a system for preventing a mechanical damage of an internal combustion engine, due to an inefficient lubrication of the latter.
  • The basic idea of the present invention is to provide a system that is able to estimate the inefficiency conditions of the lubricating circuit and to limit the degradation of the mechanical parts.
  • An object of the present invention is a system for preventing a mechanical damage of an internal combustion engine, due to an inefficient lubrication of the latter, in accordance with claim 1.
    According to a preferred alternative embodiment of the invention, a possible over-use of the mechanical part of the engine, turbo-supercharger included, is estimated, limiting or inhibiting such over-use. In other words, the engine, as well as the supercharging unit, are forced to reduce their number of revolutions.
  • Another object of the present invention is an internal combustion engine equipped with the aforementioned control system.
  • A further object of the present invention is a vehicle comprising an internal combustion engine equipped with the aforementioned control system.
  • The claims are an integral part of the present description.
    • Brief description of the Figures
  • Further purposes and advantages of the present invention will become clear from the following detailed description of a preferred embodiment (and of its alternative embodiments) and the drawings that are attached hereto, which are merely illustrative and non-limitative, in which:
    • figure 1 shows schematically the system that is object of the present invention, applied to an internal combustion engine,
    • figure 2 shows a logic diagram of the functioning of the system of figure 1.
    • In the figures the same reference numbers and letters identify the same elements or components.
    Detailed description of preferred embodiments of the invention
  • Figure 1 shows a scheme of an internal combustion engine E equipped with at least one turbo-supercharging stage comprising a turbine T having an inlet connected with the exhaust manifold of the internal combustion engine and a compressor C, driven by the turbine T, having an outlet connected with the intake manifold of the internal combustion engine E.
    The engine is equipped per se with processing means, for example an engine control unit ECU, means for measuring a pressure of the lubricating oil P and supply means J, generally the fuel injection system, controlled by the engine control unit ECU and/or by means for controlling the supercharging of the internal combustion engine, namely at least one among:
    • means for controlling the geometry of the turbine,
    • means for controlling a waste gate valve,
    • means for controlling an engine brake valve on the exhaust pipe upstream of the turbine,
    • means for controlling an exhaust gas recirculation valve between the exhaust duct upstream of the turbine and the intake duct downstream of the compressor,
    • means for controlling an air limiting valve (throttle) on the intake duct.
    The system that is object of the invention allows to actuate a monitoring of the continuous type of the lubricating oil pressure and to actuate one or more prevention strategies, at least when the engine is started, until the oil pressure is stabilized and exceeds a predefined threshold.
    Such strategies, for example, may include
    • displaying a light or a message in the dashboard, which indicates a condition of "vehicle not ready" and/or
    • limiting the torque delivered by the internal combustion engine and/or
    • limiting the maximum number of revolutions per minute of the internal combustion engine and/or of a respective turbo-supercharging unit.
    It is worth pointing out that the second and the third aforementioned strategies are strongly interrelated to each other, since a reduction of the revolutions per minute corresponds to a reduction of the torque delivered and vice versa.
    For the rotating mechanical parts, the maximum number of revolutions per minute (rpm_max_no_lub) to which such part can be subjected when the lubricating circuit is not efficient, is defined during the design stage.
    Such maximum number of revolutions per minute (rpm_max_no_lub) can be several times lower than the maximum number of revolutions per minute (rpm_max) that such parts can bear in conditions of optimal lubrication.
    Preferably, when a possible over-use of the mechanical parts is detected, namely when the speed of rotation is too high, the system brings such speed of rotation back to the maximum acceptable speed in conditions of inefficient lubrication (rpm_max_no_lub).
    According to a preferred embodiment of the invention, it is possible to intervene on the supply means J, after setting a fixed rpm limit in the supply map of the engine, or a variable rpm limit can be set, calculated according to the following formula: rpm = rpm_mis - C_mis x f P T
    Figure imgb0001
    • rpm: correct speed of rotation, namely forced by the prevention system,
    • rpm_mis: current speed of rotation,
    • C_mis: torque delivered
    • f(P,T): conversion factor of the torque delivered into rpm, as a function of ambient pressure P and of ambient temperature T.
    A limitation of the number of revolutions per minute of the internal combustion engine consequently implies a reduction of the number of revolutions per minute of a respective turbo-supercharging unit.
    According to another preferred alternative embodiment of the invention, the flow rate of the intake air of the engine is reduced, by means of at least one of
    • means for controlling the geometry of the turbine,
    • means for controlling a wastegate valve,
    • means for controlling an engine brake valve on the exhaust pipe upstream of the turbine,
    • means for controlling an exhaust gas recirculation valve between the exhaust duct upstream of the turbine and the intake duct downstream of the compressor,
    • means for controlling an air limiting valve (throttle) on the intake duct,
    so as to reduce the number of revolutions per minute of the turbo-supercharging unit.
  • It is evident that regardless of the fact that one acts either on the supply maps, namely on the injection system, or on the supercharging system, a reduction of the overall revolutions per minute of the engine, supercharging unit included, is obtained.
    According to a preferred alternative embodiment of the invention, the prevention system is activated when the engine is started and stays active until a full filling and pressurization of the lubricating circuit is detected.
    In these case there are two options:
    • the pressure of the lubricating oil is either measured or estimated.
    It is worth pointing out that, since the pressure sensor is generally placed upstream of the turbine, it is necessary to estimate the pressurization time in the part of the circuit that is comprised between the sensor and the turbine, so as to avoid considering the circuit as completely efficient when it is not yet.
    Figure 2 shows a flow diagram showing an implementation example of the present system:
    • step 1: detection of the engine starting,
    • step 2: measuring of a pressure value of the lubricating oil and if such value exceeds a predetermined threshold (SI), then
    • step 3: the circuit is considered efficient, and the cycle is ended, otherwise
    • step 4: (NO) execution of at least one of the aforementioned strategies and back to the measuring (step 2) of the pressure of the lubricating oil.
    Thus, the system can be enabled at every starting of the engine and disabled as soon as the pressure of the lubrication oil reaches said predefined threshold.
    The present invention may advantageously be realized by means of a computer program, which comprises program code means performing one or more steps of said method, when said program is run on a computer. For this reason the scope of the present patent is meant to cover also said computer program and the computer-readable means that comprise a recorded message, such computer-readable means comprising the program code means for performing one or more steps of such method, when such program is run on a computer.
  • It will be apparent to the person skilled in the art that other alternative and equivalent embodiments of the invention can be conceived and reduced to practice without departing from the scope of the invention.
  • By virtue of the present invention it is possible to avoid the over-use of the mechanical parts of the engine, reducing the probability of mechanical damages due to the non optimal lubrication thereof.
  • Futhermore, compared with solutions of the mechanical type, it is possible to avoid any mechanical modification that is usually more expensive than the present invention, which can be advantageously implemented via software, by means of the aforementioned engine control unit ECU, or by means of any further electronic control unit onboard of the vehicle.
  • From the description set forth above it will be possible for the person skilled in the art to embody the invention with no need of describing further construction details. The elements and the characteristics described in the different preferred embodiments may be combined without departing from the scope of the present application. What is described in the description of the prior art, if not explicitly excluded in the detailed description, has to be considered in combination with the characteristics of the present invention, forming an integral part of the present invention.

Claims (10)

  1. System for preventing a mechanical damage of an internal combustion engine, due to an inefficient lubrication of the engine itself, comprising means for measuring or estimating a pressure of a lubrication circuit (P) of the internal combustion engine, processing means (ECU) configured to activate means for preventing a mechanical damage of the internal combustion engine (E) at each starting of the latter, until said pressure is below a predetermined threshold.
  2. System according to claim 1, wherein said prevention means comprise:
    - a light or a message indicating a condition of "vehicle not ready" and/or
    - means for limiting a torque delivered by the internal combustion engine and/or
    - means for limiting the maximum revolutions per minute of the internal combustion engine and/or of a respective turbo-supercharging unit and/or
    - means for controlling an exhaust gas recirculation valve between the exhaust pipe upstream of the turbine and the intake pipe downstream of the compressor and/or
    - means for controlling an air limiting valve (throttle) on the intake pipe,
    - in order to reduce the number of revolutions per minute of the turbo-supercharging unit.
  3. System according to claim 2, wherein when said prevention means comprise means for limiting a maximum number of revolutions per minute of the internal combustion engine, said limiting means are configured to force the speed of rotation of the engine to a fixed rpm value, or to a value given by the following formula: rpm = rpm_mis - C_mis x f P T
    Figure imgb0002
    rpm_mis: current speed of rotation,
    C_mis: torque delivered
    f(P,T): conversion factor of the torque delivered into rpm, as a function of ambient pressure T and of ambient temperature T.
  4. System according to claim 2 or 3, wherein when said prevention means comprise means for limiting a maximum number of revolutions per minute of the internal combustion engine, said prevention means are adapted to intervene on
    - fuel supply means (J) of the internal combustion engine to reduce the number of revolutions per minute of the internal combustion engine (E) and consequently of the turbo-supercharging unit (T, C) and/or
    they are adapted to intervene on at least one of
    - means for controlling the geometry of the turbine,
    - means for controlling a waste gate valve,
    - means for controlling an engine brake valve on the exhaust pipe upstream of the turbine,
    - means for controlling an exhaust gas recirculation valve between the exhaust duct upstream of the turbine and the intake duct downstream of the compressor,
    - means for controlling an air limiting valve (throttle) on the intake duct,
    in order to reduce the number of revolutions per minute of the turbo-supercharging unit (T, C).
  5. Method for actuating a system for preventing a mechanical damage of an internal combustion engine, due to an inefficient lubrication of the engine itself, according to any of the claims from 1 to 4, comprising the following steps:
    - (step 1) detecting the engine starting,
    - (step 2) measuring a pressure value of the lubricating oil and if such value exceeds a predetermined threshold (SI), then
    - (step 3) the circuit is considered efficient, and the cycle is ended, otherwise
    - (step 4) (NO) at least one prevention strategy is executed and back to the measuring (2) of the pressure of the lubricating oil.
  6. Method according to claim 5, wherein said prevention strategy is at least one of the following:
    - displaying a light or a message indicating a condition of "vehicle not ready" and/or
    - limiting the torque delivered by the internal combustion engine and/or
    - limiting the maximum number of revolutions per minute of the internal combustion engine and/or of a respective turbo-supercharging unit.
  7. Computer program comprising program code means adapted to perform all the steps of one of the claims 5 or 6, when said program is run on a computer.
  8. Computer-readable means comprising a recorded program, said computer-readable means comprising program code means adapted to perform all the steps of one of the claims 5 or 6, when said program is run on a computer.
  9. Internal combustion engine comprising a system for preventing a mechanical damage of the engine itself, due to an inefficient lubrication, according to one of the claims from 1 to 4.
  10. Terrestrial vehicle comprising an internal combustion engine according to claim 9.
EP14186815.8A 2013-09-30 2014-09-29 System for preventing a mechanical damage of an internal combustion engine due to an inefficient lubrication of the engine Active EP2853722B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001608A ITMI20131608A1 (en) 2013-09-30 2013-09-30 PREVENTION SYSTEM OF A MECHANICAL DAMAGE OF AN INTERNAL COMBUSTION ENGINE DUE TO AN INEFFICIENT LUBRICATION OF THE SAME

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EP2853722A1 true EP2853722A1 (en) 2015-04-01
EP2853722B1 EP2853722B1 (en) 2018-07-25

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US (1) US20150094938A1 (en)
EP (1) EP2853722B1 (en)
JP (1) JP6498902B2 (en)
KR (1) KR102265289B1 (en)
CN (1) CN104514592B (en)
BR (1) BR102014024022B1 (en)
ES (1) ES2689645T3 (en)
IT (1) ITMI20131608A1 (en)
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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108798928B (en) * 2017-05-04 2022-07-15 罗伯特·博世有限公司 Method for controlling fuel supply in common rail fuel injection system
GB2569375B (en) * 2017-12-15 2020-01-01 Ford Global Tech Llc Accessory drive system
US10480425B2 (en) * 2018-03-16 2019-11-19 GM Global Technology Operations LLC Method of managing a propulsion system based on health of a lubrication system
FR3140652A1 (en) * 2022-10-07 2024-04-12 Psa Automobiles Sa Method for diagnosing the lubrication of an internal combustion engine turbocharger

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02119626A (en) * 1988-10-27 1990-05-07 Mazda Motor Corp Control device of engine with supercharger
JPH04303128A (en) * 1991-03-29 1992-10-27 Komatsu Ltd Preventing device for running-out of oil for turbocharger
US20020151229A1 (en) * 2001-04-11 2002-10-17 Isao Kanno Fuel injection control for marine engine
JP2003065085A (en) * 2001-08-27 2003-03-05 Komatsu Ltd Start control device for diesel engine
US20080133116A1 (en) * 2006-12-05 2008-06-05 James Robert Mischler System, method, and computer software code for controlling engine warm-up of a diesel powered system
US20110106414A1 (en) * 2009-11-03 2011-05-05 International Engine Intellectual Property Company, Llc Engine with electronically controlled starting method
US20110146622A1 (en) * 2009-12-21 2011-06-23 International Engine Intellectual Property Company, Llc Control system and method for limiting engine torque based on engine oil pressure and engine oil temperature data

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5634034U (en) * 1979-08-24 1981-04-03
JPS61160540A (en) * 1984-12-29 1986-07-21 Isuzu Motors Ltd Engine revolving speed controller
JPH08232709A (en) * 1995-02-22 1996-09-10 Toyota Motor Corp Control device for internal combustion engine
JPH09228860A (en) * 1996-02-21 1997-09-02 Komatsu Ltd Control device for starting speed of engine with supercharger and its control method
MX2007010194A (en) * 2004-09-10 2008-11-04 Knorr Bremse Systeme "torque deficiency" (accumulator-based charge assistance).
JP4516393B2 (en) * 2004-09-24 2010-08-04 株式会社小松製作所 Supercharger seizure prevention device and control method thereof
US8457848B2 (en) * 2007-10-31 2013-06-04 Deere & Company Work machine with IVT output automatically adjusted dependent upon engine load
US8935077B2 (en) * 2011-01-20 2015-01-13 Ecomotors, Inc. Controlling an engine having an electronically-controlled turbocharger
WO2013121517A1 (en) * 2012-02-14 2013-08-22 トヨタ自動車株式会社 Control device for internal combustion engine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02119626A (en) * 1988-10-27 1990-05-07 Mazda Motor Corp Control device of engine with supercharger
JPH04303128A (en) * 1991-03-29 1992-10-27 Komatsu Ltd Preventing device for running-out of oil for turbocharger
US20020151229A1 (en) * 2001-04-11 2002-10-17 Isao Kanno Fuel injection control for marine engine
JP2003065085A (en) * 2001-08-27 2003-03-05 Komatsu Ltd Start control device for diesel engine
US20080133116A1 (en) * 2006-12-05 2008-06-05 James Robert Mischler System, method, and computer software code for controlling engine warm-up of a diesel powered system
US20110106414A1 (en) * 2009-11-03 2011-05-05 International Engine Intellectual Property Company, Llc Engine with electronically controlled starting method
US20110146622A1 (en) * 2009-12-21 2011-06-23 International Engine Intellectual Property Company, Llc Control system and method for limiting engine torque based on engine oil pressure and engine oil temperature data

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KR20150037552A (en) 2015-04-08
ITMI20131608A1 (en) 2015-03-31
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JP2015110941A (en) 2015-06-18
BR102014024022B1 (en) 2022-07-05
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KR102265289B1 (en) 2021-06-15
BR102014024022A2 (en) 2016-05-24

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